Blazer Forums
Discussion forum and club for Chevy Blazer owners.
http://www.blazerforum.com/

Cadillac Forum
Cadillac discussion forum and club for Cadillac owners and enthusiasts.
http://www.cadillacforum.com/

CarForums.net
Auto enthusiast chat forums with discussions about domestics, imports, classics, 4x4s, and many other vehicles.
http://www.carforums.net/

Chiptuning forum
Chiptuning community, all about chip tuning and ECU remmaping, OBD-II details, software and hardware, tuning files
http://www.checksumm.com

Custom Ford Fire Truck
Comprehensive site detailing the transformation of a Ford F-250
http://www.projectresponder.com

Mustang
Ford Mustang website with forums, news, articles and a great members.
https://www.mustangevolution.com/